Info:
Fallout 3: Operation Anchorage - Official mini-supplement Fallout 3: Operation Anchorage for approximately 4-5 hours of gameplay and the represents a military simulator with elements of stealth. The player will liberate the city of Anchorage from the invasion of Chinese communists. The player will be available to new weapons, new armor, new skills.

Fallout 3: The Pitt Expansion - Also, as in the first official add-Operation Anchorage you get a radio signal for help. Upon arrival the signal you are helping a man named Werner to defend from a handful of obviously non-native raiders. Then grateful Werner asks you to get a means of mutations, which have tortured the inhabitants of the city Pittsburgh and sends you to a deserted railway station, where you find yourself in a society of slave-raiders. And continue to play and investigate yourself.